lights-out
/ˈlaɪts.aʊt/ noun, adjective
- noun The time at night at which artificial lights are to be turned off, a curfew or bedtime.
- noun The prescribed bedtime for persons living in a boarding school or staying in a hospital. “We were all expected to be in bed by lights-out.”
- noun (idiomatic, euphemistic) Something hopeless, over; unconsciousness. [(usually) with for and noun phrase] “It's gonna be lights out for you, pal!”
- noun (idiomatic, sports) A decisive play.
- adjective (manufacturing) Done or performed in the dark because of a fully automated working environment. Often describes night shift or third shift work. “lights-out manufacturing”
Synonyms
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “lights-out”, CC BY-SA 4.0. Details